Question

Today,high tide measured 5.5 ft and low tide measured 1 ft. What is the amplitude of a cosine function modeling the depth of the water in feet as a function of time in hours

Answer 1

`A = 2.25ft`

Explanation:

Given

`High = 5.5ft`

`Low = 1ft`

Required

The amplitude (A)

This is calculated as:

`A = (1)/(2)(High - Low)`

So, we have:

`A = (1)/(2)(5.5ft - 1ft)`

`A = (1)/(2) * 4.5ft`

`A = 2.25ft`